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Only when you actually do the tuning you will know! All the tuners claim the same or even improved fuel economy after the tuning, but only in everyday use you will know if it is true or not.
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2011- : BMW 116i (F20)
2009-11: BMW Z4 2.5si (E85)
2007-09: Mini Cooper S (R56)
2005-07: BMW 325ti (E46)
2004-05: BMW 318i (E36)
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